28
Operation
P 2.1S/P 4.1S user manual V6870, version 3.1
Changing to Analog Control (before firmware version 1.37)
Switch analog control on or off by using the interface RS-232 and a suitable
hyperterminal program.
Prerequisite:
Interface RS-232 was connected and successfully configured. The pump is
connected to the controlling computer via a free COM interface.
A hyperterminal program is available on the computer.
Status display is active.
Result:
The display shows a star symbol to the left of the flow rate. You are not
able to change the flow rate via keypad.
To deactive analog control, enter “0” instead of “1” as parameter for EXT-
CONTR.
Changing to Analog Control (firmware version 1.37 or higher)
If you change the pump to analog control, you are changing the start settings
for switch on. In analog operationg, the pump starts with activated flow. The
flow rate is defined by the applied voltage. Close the contact between
GROUND and START IN before starting the pump.
EXTFLOW?
RD
IMOTOR?
RD 0 – 100
Motor current in relative units
LOCAL
WR
Put the instrument in local mode
REMOTE
WR
Put the instrument in remote mode
ERRORS?
RD
Returns 5 last saved errors
ON
WR
Start flow
OFF
WR
Stop flow
Process
Figure
1. Press both arrow keys simultane-
ously until the correct display
appears.
2. Let go of the arrow keys.
3. Using the arrow keys, scroll until
RS-232 is displayed.
Fig. 20
Display control
4. Enter EXTCONTR:1 in the hyperterminal program (see “Control com-
Control com-
mand
Range and specifi-
cation
Description
